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  Korniienko, A.; Wartelle, A.; Kronseder, M.; Zeller, V.; Foerster, M.; Niño, M.Á.; Ruiz-Gomes, S.; Khaliq, M.W.; Weigand, M.; Wintz, S.; Back, C.H.: Magnetization patterns in GaAs-Fe₃₃Co₆₇ core-shell nanorods. Applied Physics Letters 125 (2024), p. 252406/1-6

10.1063/5.0239107
Open Access Version

Abstract:
We present a study on the static magnetic properties of individual GaAs- core–shell nanorods. X-ray magnetic circular dichroism combined with photoemission electron microscopy and scanning transmission x-ray microscopy were used to investigate the magnetic nanostructures. The magnetic layer is purposely designed to establish a magnetic easy axis neither along the nanostructure's long axis nor perpendicular to it to promote a 3D magnetic helical configuration on the tubular surface. In practice, two types of magnetic textures with in-plane magnetization were found inside the nanostructures' facets: magnetic domains with almost longitudinal or almost perpendicular magnetization with respect to the axis of the tube. We observe that a magnetic field applied perpendicular to the long axis of the nanostructure can add an azimuthal component of the magnetization to the previously almost longitudinal magnetization.